Loom stop motion



Feb. 9, 1954 J. LACHAPELLE LOOM STOP MOTION Filed Feb. 20, 1952 /VrroR-y Patented Feb. 9, 1 954 UNITED STATES TENT OFFICE LOOM STOP MOTION tion of Canada Application February 20, 1952, Serial No. 272,554

The present invention relates to improvements in textile looms and more particularly to a means for automatically stopping a loom when the cloth roll has been filled to a predetermined amount.

During the weaving process, textiles are normally woven in a continuous length but are removed from the loom in shorter lengths or cuts These cuts are usually maintained at a length suitable for inspection and subsequent shipping to the customer. Usually, provision, in the form of a warp measuring motion, is made at the slasher for indicating the length of a cut on the warp yarns so that the operator of the loom will know when the end of a cut is near. When the portion of the cloth bearing the mark is wound on the cloth roller the loom is stopped and the cloth cut at the mark and removed from the loom. As will be appreciated, this means that the operator must watch the run of each loom fairly closely at the end of each cut so as to be able to stop the loom at the required time.

The present invention aims to provide a means of automatically stopping a loom when a predetermined amount of cloth has been wound on the cloth roller.

Accordingly, the invention is a loom stop motion which, in combination, with the usual cloth roller, cloth roller mounting means, and the knock-ofi mechanism of the loom, provides a means of transmitting the movement of the cloth roller as the cloth builds up to the knock-off lever of the loom so as to pull it into stop position.

More specifically, in accordance with the present invention, the preferred means of transmitting the movement of the cloth roll shaft consists of an elongated exible rod mounted in a flexible tube. Each end of the flexible tube is provided with an adjustable cylindrical terminal member and each end of the exible rod isvconnected to a headed plunger slidably mounted in one of the cylindrical members. One of the plunger cylinder assemblies is mounted to the loom frame with the plunger head in the path of the cloth roller While the other assembly is mounted to the loom frame beneath and adjacent to a pivotally mounted knock-off member. The knock-off member is mounted on the loom frame so as to be capable of being pivoted into the path of the oscillating lay of the loom and is also pivotally connected to the knock-olf lever of the loom. With this arrangement, depression of the rst plunger, through contact with the cloth roll, slides the iiexible rod through the flexible tube so as to extend the plunger at the other 4 Claims. (Cl. 139--340) end. The second plunger acts against the knockolf member placing itin the path of the lay so that the movement of the lay pushes the knockoi member and so pulls the interconnected knock-off lever into stop position.

As the plunger-cylinder assemblies are each adjustable as to the effective length of the plunger, the position where the plunger head cornes in Contact with the cloth roller can be predetermined so that the stopping action may take place at any predetermined position of the cloth roll relative to the amount of cloth wound on.

Having thus generally described the nature of the invention, particular reference will be made to the accompanying drawings, and in which:

Figure 1 is a diagrammatic view of a portion of a loom to illustrate certain parts associated with a preferred loom stop motion apparatus in accordance with the invention.

Figure 2 is an enlarged detail View of a portion of the cloth roll stand and cloth roller of the loom to sho'w the roller mounting means and relative position of the stop motion actuating means.

Figure 3 is a diagrammatic view of the portion of the cloth roll stand and cloth roller shown in Figure 2 and also the knock-oir arrangement of the loom to illustrate the relative positions of the plunger ends of the loom stopping apparatus when the cloth roll is lled to a predetermined amount.

Figure 4 is an enlarged detail view in section of one of the plunger assemblies showing the threaded engagement of the adjusting nut With the cylindrical member. l

With particular reference to Figure 1 of the drawing a side elevation of a loom is shown diagrammatically to illustrate a preferred embodiment of a loom stop motion constructed in accordance with the present invention.

. In this illustration I0 designates the frame of the loom, l2 designates the oscillating lay of the loom and I4 designates the cloth roll stand. The present apparatus isv designed to transmit the downward movement of the cloth roller I6 on the stand I4 to a knock-off arrangement positioned in the path of the lay I2. The knockoff arrangement when engaged by the lay is adapted to pull the usual knock-off lever I8 into loom stopping position.

The knock-off arrangement shown consists of a knock-01T bunt 2u, secured to the lay l2, which is adapted to engage a knock-oli' member 22 when this member is raised. The knock-off member 22 is pivotally mounted to a knock-off link 24 pivotally mounted on a knock-off stand 26 attached to the loom frame. A connecting rod 28 extends between the knock-off member 22 and the knock-ofi lever I8 so that forward motion of the member 22, under the inuence of the lay I2, pulls the lever I8 into loom stopping position. This. arrangement is in. common use. on many automatic looms. and is designed= primarily for use in combination with a warp stop motion actuated through breakage of warp threads.

In accordance with the present invention a bracket 30 is secured to the loom frame 'inerleatiii the pivotally mounted knock-oni member. 22. so. as to support one end of a plunger cylinder au* rangement so that a plunger; head1, 32 is: adapte@ to come in contact with and raise the member 22 into the path of the knock-off bunt 2|)V secured to the loom lay l2.

The plunger head 32 is secured to the; endf. ef

a flexible rod 34 which is mounted for sliding movement in a iiexible tube. 36 in the manner. of. a Bowden cable arrangement". One end of the flexible tube 36 is: secured to an. adjusting nut4 3'8 whi'ch.is threadably'engaged with a cylindrical member 4U mounted on bracket 3.01. The end. of the flexible rod 34 to. which the plunger head' 32 is attached'l extends through and considerably beyond' the cylindrical' member' 4U formingu a plunger portion. 13.2.

The nexible tube 36 and flexible rod' 34L` extend alongthe machine to the. cloth roll` stand' f4' where the other end of.' the tube' 33' is adjustably connected by a nut i3 to' a cylindrical member 44 mounted on arbr'acket Liii.. The bracket 4S. is secured to the cloth roll stand lit beneath the take-ofi slot 48 with the other end of.' the flexible rod 34 extending, beyond the. member' Ml. forming a plunger portion 51T having a plunger head 52. They cloth' roll stand M is, of a, well' known construction wherein the' cloth roller r6" is. supported on bearings 60 mounted for vertical" sliding movement in a slot 62. The downward movement of the cloth roller IG acts on a rack 6u' which. is inv meshed engagement with a train of gears (not illustrated? which' act. against a spring loaded shaftl adapted to control. the Winding on of. the cloth.

With the present. arrangement as the cloth roll. builds up and the cloth roller it descends it reaches' a predetermined point', preferably alignment with the take-off slot 158', where it comes, into engagement with the plunger head" 5,2 depressing` theplunger portion B within the cylindricalmember 421' and causing a corresponding raising of' the plunger head 32 so as t'o raise'. the knock-oifmember. 22.

The. efiective length. of the flexbil'e. rod 3f. and consequently theextended amount of the plungerportions 132551 can be adjusted bythe adjusting' nuts, 38, 43,. The location ofthe adjusting nuts` 38, 43, due t'o their threadedV engagement with the cylindrical membersV 6i), 44 extends or shortens the overall combined lengthof. the flexible tube' 3'5` andthe members 4113,11@ and' consequentlyA thel amount of theLrod" 34' extending beyond the cyl'in'- 6 I claim:

1. In a loom having a cloth roll stand and a cloth roller slidably mounted for vertical descent on said stand as the cloth is wound on; a loom stop motion comprising the combination with loom stopping mechanism including a knock-off lever: assembly/- adapted te actualize the knock-off lever: of" theV loonfr` into loom stopping position and having a pivotally mounted member engageable the loom lay when raised, and a flexible motion transmitting member between said cloth roll stand and said knock-off assembly whereby downward. movement of said cloth roller is transmittedi tdcauseunward movement oi said pivotallrmountedl knock-on lever assembly member.

2. loom stopmotion as claimed in claim 1 wherein. said flexible, motion transmitting member comprises a 'exible cable slidably housed within. al iiexible tube and extending adjacent said cloth roll stand to adjacent said loom stopping assembly', one.- end ot said: exible cable` being in. the path of said clothroller and. the otherl end being disposed beneath. said. pivotally. mount-- ed knock-roti. member.

3. In a loom having a cloth roll stand. and. a. cloth rollerv slidablyV mounted for vertical. descent onl said stand as the clothis wound on; a loom. stop. motion comprising the combination witl'tV loom. stopping. mechanism including. a. knock oli lever assembly adapted tdactuate the knock.- off. lever ofv theh loom. into loom stopping posi tion and having a.` pivotally mounted member connected to the loom knock-ou. lever and engageablev by. the lay. of the; loom when raised; and a-v exible cable. slid'ably housedlin. a. exible tube extending. irom the said' cloth roll stand to. adjacent said knock-ofi lever assembly, said tube. being mounted at. one end byadjustable means. to a bracket securedI to said"4 cloth. rolI stand with. the. other end mountedy by adjustable means tio4 a. bracket secured'. to the` frarnefof'saidloom beneath said pivotall'y mounted stop motion memher,l one end of said flexible. cable` extendingl beyond sai'dexible tube in the path of' saidfcloth roller with the other endv of sai'd` flexible cable extending beyond the other' end' of said' fiexibl'e. tube, directly beneath said pivotallymounted stopmotion member, whereby` downward' movement of said cloth roller is` transmitted to cause 11D- ward movement of' said pivotally' mounted' stop` motion' member raising it into. the path; of said loom lay;

4'. A stopV motion as4 claimedin claim 3" wherein said adjustable means comprise cylindrical mem. bers mounted on said tube supporting brackets andthe ends of' saidflexible tube are connectedc to adjustable nuts threadably engaged! withj sai'el cylindrical; members. Y

JRME LACHAPELLE:

References. oneri'- i'n the fue of' misser-entf UNITED: STATES; PATENTS.

Number NameL Y Date '798.964 Sampsonk Juryf iene 9973962 Bracken Dec: 29, 11908.

13016-2009 Herbert Jan. 30)4 19M 2`;049;356 Costello .lilly 28,v 12936y 

